1. Izindinganiso zokusebenzisa
Qinisekisa inguqulo yakamuva ye-ASTM A333/A 333M (ukwakheka kwamakhemikhali enguqulo ngemva kuka-2016 kuyalungiswa, futhi imikhawulo emisha yezinto ezifana ne-Cr, Ni, ne-Mo ziyengezwa).
2. Ukulawula ukwakheka kwamakhemikhali
Imikhawulo yama-elementi angukhiye:
C≤0.30% (ikhabhoni ephansi iqinisekisa ukuqina), Mn 0.29-1.06% (ilungiswe ngokuqukethwe kuka-C), P≤0.025%, S≤0.025% (khawula ngokuqinile izakhi eziyingozi).
Inguqulo ka-2016 ingeza imikhawulo ephezulu ye-Ni, Cr, Mo, njll. (efana ne-Ni≤0.40%), futhi kuyadingeka ukuhlola ukuthi incwadi yewaranti imakwe ngokulingana kwekhabhoni (CET).
Ukuthuthukiswa kwezinto ezibonakalayo: Inguqulo entsha ye-A333GR6 ithuthukisiwe isuka ku-C-Mn steel yaya kwinsimbi ehlanganisiwe ephansi, ngokusebenza okungcono.
1. Izakhiwo zemishini
Amandla aqinile ≥415MPa, amandla esivuno ≥240MPa, isilinganiso samandla esikhiqizo esiphansi (sibonisa ikhono lokuguqulwa kwepulasitiki)
Ukuhlolwa komthelela wezinga lokushisa eliphansi:
Izinga lokushisa lokuhlola liyahlukahluka ngokuqina kodonga (okufana -45℃~-52℃), futhi izimfuneko zenkontileka kufanele zivezwe ngokucacile.
Inani lamandla omthelela kufanele lifinyelele izinga, ngokuvamile elidinga u-≥20J (bheka i-ASTM A333 ukuze uthole imininingwane).
2. Isakhiwo se-Metallographic
Isimo sokuhlinzeka kufanele sibe yi-uniform ferrite + pearlite, enobukhulu obusanhlamvu obuyi-7 ~ 9 (izinhlamvu eziqinile zinganciphisa isilinganiso samandla esivuno).
Okungcono ukhethe amapayipi ensimbi acishiwe + acijile (isakhiwo sine-troostite epholile, futhi ukuqina kokushisa okuphansi kungcono).
Inqubo yokwelapha ukushisa
Amarekhodi okwelashwa kokushisa kufanele ahlinzekwe: ukushisisa ≥815℃→ukucisha amanzi→ukushisa ukuze kuqinisekiswe ukufana kwesakhiwo.
Gwema isimo sokuqala esingalashwanga noma esingaphathwanga ngendlela efanele (isakhiwo esimahhadla siholela emazingeni okushisa aphansi).
Isimo sokudiliva
Imvamisa ilethwa esimweni esejwayelekile + esithukuthele noma esivaliwe + esithukuthele, esidinga ukucaciswa kunkontileka.
1. Ukuqina kwezindonga nomthelela wokulinganisa izinga lokushisa
Isibonelo: uma ukujiya kodonga kungu-7.62mm, izinga lokushisa lokuhlola umthelela lidinga ukufika -52℃ (ngaphansi kwezinga elingu--45℃).
Ukucaciswa kwendawo okujwayelekile: 8-1240mm×1-200mm (SCH5S-XXS), isidingo sangempela sidinga ukuhlolwa.
2. Enye into efanayo
I-A333GR6≈X42N/L290N/API 5L B PSL2 (ipayipi lomugqa), kodwa kuyadingeka ukuze kuqinisekiswe ukuthi ukusebenza kwezinga lokushisa eliphansi kuyahlangatshezwa yini.
Okufanele uhlole amadokhumenti
Isitifiketi se-Material (MTC), umbiko wokwelashwa kokushisa, umbiko wokuhlola umthelela wezinga lokushisa eliphansi, umbiko wokuhlola ongabhubhisi (UT/RT).
Ngemuva kwenguqulo ka-2016, idatha yokuhlola yezinto ezisanda kufakwa ze-alloy (Ni, Cr, njll.) kumele ifakwe.
Ukuhlola kabusha okuvela eceleni
Kunconywa ukuthi uphinde uhlole izinto ezibalulekile (njengokuhlolwa komthelela, ukwakheka kwamakhemikhali) ngokuthatha amasampula, ikakhulukazi izinhlelo zokusebenza ezinobungozi obukhulu (njengamapayipi e-LNG).
Izinga lokushisa
Izinga lokushisa elidizayinelwe ≥-45℃, izimo zezinga lokushisa eliphansi kakhulu (ezifana -195℃) zidinga ukuhlola ukuthi ingabe izinga eliphezulu (elifana ne-A333GR3/GR8) liyadingeka yini.
Uhlelo lokusebenza lwemboni
I-Petrochemical (i-ethylene, i-LNG), imishini yesiqandisi, amapayipi e-cryogenic, njll., idinga ukucabangela ukuvikeleka okwengeziwe (okufana nokwemboza) ngokuya ngokugqwala kwendawo
Iziqu nokusebenza
Khetha ngokukhethekile abakhiqizi abaneziqu zokukhiqiza ze-ASTM A333, futhi udinga izimo zokunikezela zamaphrojekthi afanayo.
Qaphela ukuziphatha kwe-"OEM" yabahwebi futhi uqinisekise imibhalo yokuqala yesiqinisekiso sasembonini.
Intengo nesikhathi sokudiliva
Inguqulo ye-alloy ephansi (ngaphambi kuka-2016) ingaba nenani eliphansi, kodwa umehluko wokusebenza mkhulu, futhi ukusebenza kwezindleko ezibanzi kuyadingeka.
Ukucaciswa okukhethekile (okunjengamapayipi anodonga oluwugqinsi anobubanzi obukhulu) kungase kudingeke kwenziwe ngendlela oyifisayo, kunwetshwe umjikelezo wokulethwa.
Ingozi yokudideka: Ungaphambanisi i-A333GR6 ne-A335GR6 (insimbi ye-chromium-molybdenum yezinga lokushisa eliphezulu).
I-inventory endala evamile: Qinisekisa ukuthi ipayipi lensimbi liyakhiqizwa yini ngemva kwenguqulo ka-2016 ukuze kugwenywe izici zengxubevange yemikhiqizo yakudala evamile engafinyeleli izindinganiso.
Inqubo yokushisela: Ukushisa okuphansi kwamapayipi ensimbi kudinga izinto zokushisela ezifanayo (njenge-ENiCrMo-3), futhi umphakeli kufanele anikeze isiqondiso sokushisela.
Ngala maphuzu angenhla, umthengi angakwazi ukuhlola ngokuhlelekile ukuthobela, ukufanisa ukusebenza nokuthembeka komnikezeli wepayipi lengxubevange ye-A333GR6 ukuze aqinisekise ukuphepha nomnotho wephrojekthi.
Isikhathi sokuthumela: Jun-12-2025
